<template>
  <div id="app">
    <div class="container">
      <!-- 顶部框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <tr v-for="item in list" :key="item.id">
            <td>{{ item.id }}</td>
            <td>{{ item.name }}</td>

            <!-- 如果价格超过100，就有red这个类 -->
            <!-- 做判断   在class里面item的值大于1000 才会变红 -->
            <td :class="{ red: item.price > 100 }">{{ item.price }}</td>
            <td>{{ item.time }}</td>
            <td><a @click="del(item.id);" href="#">删除</a></td>
          </tr>
          <tr>
            <td colspan="2">总价{{ tots }}</td>
            <td colspan="2">均价:{{ pops }}</td>
          </tr>
        </tbody>
        <!-- 
        <tfoot >
          <tr>
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
            -->
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input
              v-model="name"
              type="text"
              class="form-control"
              placeholder="资产名称"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input
              v-model.number="price"
              type="number"
              class="form-control"
              placeholder="价格"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button @click.prevent="btn" class="btn btn-primary">添加资产</button>
      </form>
    </div>
  </div>
</template>

<script>
// import moment from 'moment'y

// 目标2: 添加数据到数组, 自动更新视图
// 2.1 绑定点击事件
// 2.2 对表单进行双向绑定
// 2.3 数据校验, 非空判断
// 2.4 添加到数组

export default {
  data() {
    return {
      name: "", // 名称
      price: 0, // 价格
      list: [
        { id: 100, name: "外套", price: 199, time: new Date("2010-08-12") },
        { id: 101, name: "裤子", price: 58, time: new Date("2013-09-01") },
        { id: 102, name: "鞋", price: 25.4, time: new Date("2018-11-22") },
        { id: 103, name: "头发", price: 19900, time: new Date("2020-12-12") },
      ],
    };
  },

  methods: {
    btn() {
      if (this.price <= 0 || this.name.trim().length === 0)
        return alert("价格和类名不能为空");
      //校验成功
      //将内容渲染进去 用push
      let id =
        this.list.length > 0 ? this.list[this.list.length - 1].id + 1 : 1;
      //已经忘了
      this.list.push({
        id,
        name: this.name,
        price: this.price,
        time: new Date(),
      });
      //添加完 框内为空
      (this.name = ""), (this.price = "");
    },
    del(id) {
      let index = this.list.findIndex((item) => item.id === id);
      this.list.splice(index, 1);
    },
  },
  computed: {
    tots() {
      let sun = 0;
      this.list.forEach((item) => {
        sun += item.price;
      });
      return sun;
    },
    pops() {
      return (this.tots / this.list.length).toFixed(2);
    },
  },
};
</script>

<style >
.red {
  color: red;
}
</style>